COMPUTER STUDIES QUESTIONS WITH ANSWERS
(a) What is meant by Data Communication Equipment? (1 mark) |
Parallel Cables | Serial Cables |
Transmit information simultaneously using a set of many conductors (wires) |
Support transmission of data one bit at a time |
Transmit data faster than serial cables | Are slow in transmission of data |
Transmit data over short distances | Transmit data over long distances |
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Explain the following storage disks
i) Zip disks
ii) Jaz disks
They are high capacity disks that resemble the floppy disks. They are slightly larger and thicker in size .It can hold as much as 250MB
Jaz disks
They are small portable disks with high storage capacity of about 1GB to 2Gb.They are used to store data that require large storage
Give four examples of optical disks.
Digital versatile disk (DVDs)
Compact disk (CD)
Optical card
Optical tape
What do you understand by the following terms:
i) Industrial espionage
ii) Eaves dropping
iii) Surveillance
–Spying on your competitor to get information that you can use to counter or finish competitor. The aim is to get ideas on how to counter by developing similar approach or sabotage.
ii) Eavesdropping
-Tapping into communication channels to get information
iii) Surveillance
This is keeping of a profile of all computer activities done by another person
Differentiate between the following:
i) surf/browse
ii) Hyperlink
- It is the process of accessing internet resource like the web page and website
Hyperlink
It is a text on picture on an electronic document especially webpage that cause other web pages to open when the link is clicked.
Explain two functions performed by the UPS
- Filters power by eliminating brownouts and power surges before it enters into the computer
- Alerts the user when power goes off
- Temporary stores power to let the user save his/her work before the computer goes off
List three data processing methods
- Manual
- Mechanical
- Electronic
Define the term internet.
List four services offered by internet
- World wide web
- Electronic mail
- Electronic commerce
- Electronic learning
Differentiate between fourth generation languages and third generation languages
- Used integrated circuits (ICs) to process data
- Were large in size compared to fourth generation language
- Used VLSI-very large scale integrated circuits to process data
- Were smaller in size compared to third generation
State three communication methods without cables
- Microwave
- Satellite
- Radio transmission
- Microwave communication
- Infrared Communications
- Bluetooth and Zigbee
- Paging systems
- Broadband wireless access
- Cellular telephone systems
- Cordless Phones
It is required that numbers from 5 to 100 in the series 5,10,15....100 are multiplied and the product displayed. Design a flowchart for solving the problem. (7 mks)
What is an Assembler?
answer
Question
If DATA is the following sorted list of 13 elements, such that N=13: (where N is the number of elements in the list).1 1, 22, 30, 33, 40, 44, 55, 60, 66, 77, 80, 88, 99. (a) Determine the output from the flowchart if ITEM is: (1) 40 (2 marks) (ii) 99 (2 marks) (iii) 120 (2 marks) (iv) 5 (2 mark) (b) Explain the purpose of this flowchart. (2 marks) (c) Write a pseudocode for the above flowchart. (5 marks) |
Question 2:
The formula of finding the roots of a quadratic expression is given here below
b2 - 4ac is calculated
If the discriminant is negative, then the roots are termed as "imaginary" otherwise the two roots are calculated using the formula.
Write a pseudo code that will solve the problem above. The values of a, b and c are entered from the keyboard. (5mks)
Question 3 - Pseudo-code
- A club wants to go for a trip. To qualify, one has to have paid a membership fee of 500 and shown a record for being active member of the club.
- Write a pseudocode for the above problem (6mks)
- Write a program algorithm that would enable the user to enter student marks. The program should then determine whether the mark entered is a pass or fail given that the pass mark is 50
START
Print “enter student marks”
Read student marks
IF marks<50 THEN
Print “Fail”
ELSE
Print “Pass”
END IF
STOP
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